- 09 Jun, 2014 38 commits
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Tyler Stachecki authored
commit af61e27c upstream. On suspend, _scsih_suspend calls mpt2sas_base_free_resources, which in turn calls pci_disable_device if the device is enabled prior to suspending. However, _scsih_suspend also calls pci_disable_device itself. Thus, in the event that the device is enabled prior to suspending, pci_disable_device will be called twice. This patch removes the duplicate call to pci_disable_device in _scsi_suspend as it is both unnecessary and results in a kernel oops. Signed-off-by:
Tyler Stachecki <tstache1@binghamton.edu> Signed-off-by:
James Bottomley <JBottomley@Parallels.com> Signed-off-by:
Ben Hutchings <ben@decadent.org.uk>
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Steven Rostedt (Red Hat) authored
commit a949ae56 upstream. A race exists between module loading and enabling of function tracer. CPU 1 CPU 2 ----- ----- load_module() module->state = MODULE_STATE_COMING register_ftrace_function() mutex_lock(&ftrace_lock); ftrace_startup() update_ftrace_function(); ftrace_arch_code_modify_prepare() set_all_module_text_rw(); <enables-ftrace> ftrace_arch_code_modify_post_process() set_all_module_text_ro(); [ here all module text is set to RO, including the module that is loading!! ] blocking_notifier_call_chain(MODULE_STATE_COMING); ftrace_init_module() [ tries to modify code, but it's RO, and fails! ftrace_bug() is called] When this race happens, ftrace_bug() will produces a nasty warning and all of the function tracing features will be disabled until reboot. The simple solution is to treate module load the same way the core kernel is treated at boot. To hardcode the ftrace function modification of converting calls to mcount into nops. This is done in init/main.c there's no reason it could not be done in load_module(). This gives a better control of the changes and doesn't tie the state of the module to its notifiers as much. Ftrace is special, it needs to be treated as such. The reason this would work, is that the ftrace_module_init() would be called while the module is in MODULE_STATE_UNFORMED, which is ignored by the set_all_module_text_ro() call. Link: http://lkml.kernel.org/r/1395637826-3312-1-git-send-email-indou.takao@jp.fujitsu.comReported-by:
Takao Indoh <indou.takao@jp.fujitsu.com> Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> [bwh: Backported to 3.2: adjust context] Signed-off-by:
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Oleg Nesterov authored
commit 41c22f62 upstream. get_user_pages(mm) is simply wrong if mm->mm_users == 0 and exit_mmap/etc was already called (or is in progress), mm->mm_count can only pin mm->pgd and mm_struct itself. Change kvm_setup_async_pf/async_pf_execute to inc/dec mm->mm_users. kvm_create_vm/kvm_destroy_vm play with ->mm_count too but this case looks fine at first glance, it seems that this ->mm is only used to verify that current->mm == kvm->mm. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Radim Krčmář authored
commit 98fda169 upstream. '.done' is used to mark the completion of 'async_pf_execute()', but 'cancel_work_sync()' returns true when the work was canceled, so we use it instead. Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Reviewed-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
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Radim Krčmář authored
commit 28b441e2 upstream. When we cancel 'async_pf_execute()', we should behave as if the work was never scheduled in 'kvm_setup_async_pf()'. Fixes a bug when we can't unload module because the vm wasn't destroyed. Signed-off-by:
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Horia Geanta authored
commit 27c5fb7a upstream. GFP_ATOMIC memory allocation could fail. In this case, avoid NULL pointer dereference and notify user. Cc: Kim Phillips <kim.phillips@freescale.com> Signed-off-by:
Horia Geanta <horia.geanta@freescale.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Mohammed Habibulla authored
commit 1fb4e09a upstream. Add support for the AR9462 chip T: Bus=01 Lev=01 Prnt=01 Port=03 Cnt=03 Dev#= 3 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=04ca ProdID=3007 Rev= 0.01 C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms Signed-off-by:
Mohammed Habibulla <moch@chromium.org> Signed-off-by:
Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by:
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Johan Hedberg authored
commit 09da1f34 upstream. When we're performing reauthentication (in order to elevate the security level from an unauthenticated key to an authenticated one) we do not need to issue any encryption command once authentication completes. Since the trigger for the encryption HCI command is the ENCRYPT_PEND flag this flag should not be set in this scenario. Instead, the REAUTH_PEND flag takes care of all necessary steps for reauthentication. Signed-off-by:
Johan Hedberg <johan.hedberg@intel.com> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org> [bwh: Backported to 3.2: - Adjust context - s/conn->flags/conn->pend/] Signed-off-by:
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Thomas Hellstrom authored
commit cbd75e97 upstream. We already check that the buffer object we're accessing is registered with the file. Now also make sure that we can't DMA across buffer object boundaries. v2: Code commenting update. Signed-off-by:
Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by:
Jakob Bornecrantz <jakob@vmware.com> [bwh: Backported to 3.2: adjust context] Signed-off-by:
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Hans de Goede authored
commit 27a38856 upstream. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
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Stanislaw Gruszka authored
commit 8834d360 upstream. When disable beaconing we clear register with beacon and newer set it back, what make we stop send beacons infinitely. Signed-off-by:
Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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Alex Hung authored
commit ff413195 upstream. The tp_features.bright_acpimode will not be set correctly for brightness control because ACPI_VIDEO_HID will not be located in ACPI. As a result, a duplicated key event will always be sent. acpi_video_backlight_support() is sufficient to detect standard ACPI brightness control. Signed-off-by:
Alex Hung <alex.hung@canonical.com> Signed-off-by:
Matthew Garrett <mjg@redhat.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit e33d0ba8 ] Recycling skb always had been very tough... This time it appears GRO layer can accumulate skb->truesize adjustments made by drivers when they attach a fragment to skb. skb_gro_receive() can only subtract from skb->truesize the used part of a fragment. I spotted this problem seeing TcpExtPruneCalled and TcpExtTCPRcvCollapsed that were unexpected with a recent kernel, where TCP receive window should be sized properly to accept traffic coming from a driver not overshooting skb->truesize. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Alexander Duyck authored
[ Upstream commit ec47ea82 ] With the recent changes for how we compute the skb truesize it occurs to me we are probably going to have a lot of calls to skb_end_pointer - skb->head. Instead of running all over the place doing that it would make more sense to just make it a separate inline skb_end_offset(skb) that way we can return the correct value without having gcc having to do all the optimization to cancel out skb->head - skb->head. Signed-off-by:
Alexander Duyck <alexander.h.duyck@intel.com> Acked-by:
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Li RongQing authored
[ Upstream commit fbdc0ad0 ] the value of itag is a random value from stack, and may not be initiated by fib_validate_source, which called fib_combine_itag if CONFIG_IP_ROUTE_CLASSID is not set This will make the cached dst uncertainty Signed-off-by:
Li RongQing <roy.qing.li@gmail.com> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
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Jason Wang authored
[ Upstream commit 16c0b164 ] We drop packet unconditionally when we fail to mirror it. This is not intended in some cases. Consdier for kvm guest, we may mirror the traffic of the bridge to a tap device used by a VM. When kernel fails to mirror the packet in conditions such as when qemu crashes or stop polling the tap, it's hard for the management software to detect such condition and clean the the mirroring before. This would lead all packets to the bridge to be dropped and break the netowrk of other virtual machines. To solve the issue, the patch does not drop packets when kernel fails to mirror it, and only drop the redirected packets. Signed-off-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by:
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Peter Christensen authored
[ Upstream commit bbeb0ead ] Clearing the IFF_ALLMULTI flag on a down interface could cause an allmulti overflow on the underlying interface. Attempting the set IFF_ALLMULTI on the underlying interface would cause an error and the log message: "allmulti touches root, set allmulti failed." Signed-off-by:
Peter Christensen <pch@ordbogen.com> Signed-off-by:
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Sergey Popovich authored
[ Upstream commit aeefa1ec ] Increment fib_info_cnt in fib_create_info() right after successfuly alllocating fib_info structure, overwise fib_metrics allocation failure leads to fib_info_cnt incorrectly decremented in free_fib_info(), called on error path from fib_create_info(). Signed-off-by:
Sergey Popovich <popovich_sergei@mail.ru> Signed-off-by:
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Florian Westphal authored
[ Upstream commit ca6c5d4a ] local_df means 'ignore DF bit if set', so if its set we're allowed to perform ip fragmentation. This wasn't noticed earlier because the output path also drops such skbs (and emits needed icmp error) and because netfilter ip defrag did not set local_df until couple of days ago. Only difference is that DF-packets-larger-than MTU now discarded earlier (f.e. we avoid pointless netfilter postrouting trip). While at it, drop the repeated test ip_exceeds_mtu, checking it once is enough... Fixes: fe6cc55f ("net: ip, ipv6: handle gso skbs in forwarding path") Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
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Liu Yu authored
[ Upstream commit 0cda345d ] commit b9f47a3a (tcp_cubic: limit delayed_ack ratio to prevent divide error) try to prevent divide error, but there is still a little chance that delayed_ack can reach zero. In case the param cnt get negative value, then ratio+cnt would overflow and may happen to be zero. As a result, min(ratio, ACK_RATIO_LIMIT) will calculate to be zero. In some old kernels, such as 2.6.32, there is a bug that would pass negative param, which then ultimately leads to this divide error. commit 5b35e1e6 (tcp: fix tcp_trim_head() to adjust segment count with skb MSS) fixed the negative param issue. However, it's safe that we fix the range of delayed_ack as well, to make sure we do not hit a divide by zero. CC: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
Liu Yu <allanyuliu@tencent.com> Signed-off-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
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Vlad Yasevich authored
[ Upstream commit f114890c ] This reverts commit 12a2856b. The commit above doesn't appear to be necessary any more as the checksums appear to be correctly computed/validated. Additionally the above commit breaks kvm configurations where one VM is using a device that support checksum offload (virtio) and the other VM does not. In this case, packets leaving virtio device will have CHECKSUM_PARTIAL set. The packets is forwarded to a macvtap that has offload features turned off. Since we use CHECKSUM_UNNECESSARY, the host does does not update the checksum and thus a bad checksum is passed up to the guest. CC: Daniel Lezcano <daniel.lezcano@free.fr> CC: Patrick McHardy <kaber@trash.net> CC: Andrian Nord <nightnord@gmail.com> CC: Eric Dumazet <eric.dumazet@gmail.com> CC: Michael S. Tsirkin <mst@redhat.com> CC: Jason Wang <jasowang@redhat.com> Signed-off-by:
Vlad Yasevich <vyasevic@redhat.com> Acked-by:
Michael S. Tsirkin <mst@redhat.com> Acked-by:
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Xufeng Zhang authored
[ Upstream commit 85350871 ] commit 813b3b5d (ipv4: Use caller's on-stack flowi as-is in output route lookups.) introduces another regression which is very similar to the problem of commit e6b45241 (ipv4: reset flowi parameters on route connect) wants to fix: Before we call ip_route_output_key() in sctp_v4_get_dst() to get a dst that matches a bind address as the source address, we have already called this function previously and the flowi parameters have been initialized including flowi4_oif, so when we call this function again, the process in __ip_route_output_key() will be different because of the setting of flowi4_oif, and we'll get a networking device which corresponds to the inputted flowi4_oif as the output device, this is wrong because we'll never hit this place if the previously returned source address of dst match one of the bound addresses. To reproduce this problem, a vlan setting is enough: # ifconfig eth0 up # route del default # vconfig add eth0 2 # vconfig add eth0 3 # ifconfig eth0.2 10.0.1.14 netmask 255.255.255.0 # route add default gw 10.0.1.254 dev eth0.2 # ifconfig eth0.3 10.0.0.14 netmask 255.255.255.0 # ip rule add from 10.0.0.14 table 4 # ip route add table 4 default via 10.0.0.254 src 10.0.0.14 dev eth0.3 # sctp_darn -H 10.0.0.14 -P 36422 -h 10.1.4.134 -p 36422 -s -I You'll detect that all the flow are routed to eth0.2(10.0.1.254). Signed-off-by:
Xufeng Zhang <xufeng.zhang@windriver.com> Signed-off-by:
Julian Anastasov <ja@ssi.bg> Acked-by:
Vlad Yasevich <vyasevich@gmail.com> Signed-off-by:
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Toshiaki Makita authored
[ Upstream commit 30313a3d ] When bridge device is created with IFLA_ADDRESS, we are not calling br_stp_change_bridge_id(), which leads to incorrect local fdb management and bridge id calculation, and prevents us from receiving frames on the bridge device. Reported-by:
Tom Gundersen <teg@jklm.no> Signed-off-by:
Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by:
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David Gibson authored
[ Upstream commit c53864fd ] Since 115c9b81 (rtnetlink: Fix problem with buffer allocation), RTM_NEWLINK messages only contain the IFLA_VFINFO_LIST attribute if they were solicited by a GETLINK message containing an IFLA_EXT_MASK attribute with the RTEXT_FILTER_VF flag. That was done because some user programs broke when they received more data than expected - because IFLA_VFINFO_LIST contains information for each VF it can become large if there are many VFs. However, the IFLA_VF_PORTS attribute, supplied for devices which implement ndo_get_vf_port (currently the 'enic' driver only), has the same problem. It supplies per-VF information and can therefore become large, but it is not currently conditional on the IFLA_EXT_MASK value. Worse, it interacts badly with the existing EXT_MASK handling. When IFLA_EXT_MASK is not supplied, the buffer for netlink replies is fixed at NLMSG_GOODSIZE. If the information for IFLA_VF_PORTS exceeds this, then rtnl_fill_ifinfo() returns -EMSGSIZE on the first message in a packet. netlink_dump() will misinterpret this as having finished the listing and omit data for this interface and all subsequent ones. That can cause getifaddrs(3) to enter an infinite loop. This patch addresses the problem by only supplying IFLA_VF_PORTS when IFLA_EXT_MASK is supplied with the RTEXT_FILTER_VF flag set. Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Reviewed-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
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David Gibson authored
[ Upstream commit 973462bb ] Without IFLA_EXT_MASK specified, the information reported for a single interface in response to RTM_GETLINK is expected to fit within a netlink packet of NLMSG_GOODSIZE. If it doesn't, however, things will go badly wrong, When listing all interfaces, netlink_dump() will incorrectly treat -EMSGSIZE on the first message in a packet as the end of the listing and omit information for that interface and all subsequent ones. This can cause getifaddrs(3) to enter an infinite loop. This patch won't fix the problem, but it will WARN_ON() making it easier to track down what's going wrong. Signed-off-by:
Jiri Pirko <jpirko@redhat.com> Signed-off-by:
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Ivan Vecera authored
commit ba67b510 upstream. The patch fixes a problem with dropped jumbo frames after usage of 'ethtool -G ... rx'. Scenario: 1. ip link set eth0 up 2. ethtool -G eth0 rx N # <- This zeroes rx-jumbo 3. ip link set mtu 9000 dev eth0 The ethtool command set rx_jumbo_pending to zero so any received jumbo packets are dropped and you need to use 'ethtool -G eth0 rx-jumbo N' to workaround the issue. The patch changes the logic so rx_jumbo_pending value is changed only if jumbo frames are enabled (MTU > 1500). Signed-off-by:
Ivan Vecera <ivecera@redhat.com> Acked-by:
Michael Chan <mchan@broadcom.com> Signed-off-by:
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Mathias Krause authored
[ Upstream commit 05ab8f26 ] The BPF_S_ANC_NLATTR and BPF_S_ANC_NLATTR_NEST extensions fail to check for a minimal message length before testing the supplied offset to be within the bounds of the message. This allows the subtraction of the nla header to underflow and therefore -- as the data type is unsigned -- allowing far to big offset and length values for the search of the netlink attribute. The remainder calculation for the BPF_S_ANC_NLATTR_NEST extension is also wrong. It has the minuend and subtrahend mixed up, therefore calculates a huge length value, allowing to overrun the end of the message while looking for the netlink attribute. The following three BPF snippets will trigger the bugs when attached to a UNIX datagram socket and parsing a message with length 1, 2 or 3. ,-[ PoC for missing size check in BPF_S_ANC_NLATTR ]-- | ld #0x87654321 | ldx #42 | ld #nla | ret a `--- ,-[ PoC for the same bug in BPF_S_ANC_NLATTR_NEST ]-- | ld #0x87654321 | ldx #42 | ld #nlan | ret a `--- ,-[ PoC for wrong remainder calculation in BPF_S_ANC_NLATTR_NEST ]-- | ; (needs a fake netlink header at offset 0) | ld #0 | ldx #42 | ld #nlan | ret a `--- Fix the first issue by ensuring the message length fulfills the minimal size constrains of a nla header. Fix the second bug by getting the math for the remainder calculation right. Fixes: 4738c1db ("[SKFILTER]: Add SKF_ADF_NLATTR instruction") Fixes: d214c753 ("filter: add SKF_AD_NLATTR_NEST to look for nested..") Cc: Patrick McHardy <kaber@trash.net> Cc: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
Mathias Krause <minipli@googlemail.com> Acked-by:
Daniel Borkmann <dborkman@redhat.com> Signed-off-by:
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Wang, Xiaoming authored
[ Upstream commit b04c4619 ] Plug a group_info refcount leak in ping_init. group_info is only needed during initialization and the code failed to release the reference on exit. While here move grabbing the reference to a place where it is actually needed. Signed-off-by:
Chuansheng Liu <chuansheng.liu@intel.com> Signed-off-by:
Zhang Dongxing <dongxing.zhang@intel.com> Signed-off-by:
xiaoming wang <xiaoming.wang@intel.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 30f78d8e ] Francois reported that setting big mtu on loopback device could prevent tcp sessions making progress. We do not support (yet ?) IPv6 Jumbograms and cook corrupted packets. We must limit the IPv6 MTU to (65535 + 40) bytes in theory. Tested: ifconfig lo mtu 70000 netperf -H ::1 Before patch : Throughput : 0.05 Mbits After patch : Throughput : 35484 Mbits Reported-by:
Francois WELLENREITER <f.wellenreiter@gmail.com> Signed-off-by:
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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Thomas Richter authored
[ Upstream commit db298686 ] Remove the bonding debug_fs entries when the module initialization fails. The debug_fs entries should be removed together with all other already allocated resources. Signed-off-by:
Thomas Richter <tmricht@linux.vnet.ibm.com> Signed-off-by:
Jay Vosburgh <j.vosburgh@gmail.com> Signed-off-by:
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Florian Westphal authored
[ Upstream commit 6d39d589 ] In case of tcp, gso_size contains the tcpmss. For UFO (udp fragmentation offloading) skbs, gso_size is the fragment payload size, i.e. we must not account for udp header size. Otherwise, when using virtio drivers, a to-be-forwarded UFO GSO packet will be needlessly fragmented in the forward path, because we think its individual segments are too large for the outgoing link. Fixes: fe6cc55f ("net: ip, ipv6: handle gso skbs in forwarding path") Cc: Eric Dumazet <eric.dumazet@gmail.com> Reported-by:
Tobias Brunner <tobias@strongswan.org> Signed-off-by:
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Dmitry Petukhov authored
[ Upstream commit f34c4a35 ] When l2tp driver tries to get PMTU for the tunnel destination, it uses the pointer to struct sock that represents PPPoX socket, while it should use the pointer that represents UDP socket of the tunnel. Signed-off-by:
Dmitry Petukhov <dmgenp@gmail.com> Signed-off-by:
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Steven Rostedt (Red Hat) authored
commit 7dec935a upstream. No reason to allocate tp_module structures for modules that have no tracepoints. This just wastes memory. Fixes: b75ef8b4 "Tracepoint: Dissociate from module mutex" Acked-by:
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by:
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Thomas Graf authored
commit c58dd2dd upstream. All xtables variants suffer from the defect that the copy_to_user() to copy the counters to user memory may fail after the table has already been exchanged and thus exposed. Return an error at this point will result in freeing the already exposed table. Any subsequent packet processing will result in a kernel panic. We can't copy the counters before exposing the new tables as we want provide the counter state after the old table has been unhooked. Therefore convert this into a silent error. Cc: Florian Westphal <fw@strlen.de> Signed-off-by:
Thomas Graf <tgraf@suug.ch> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Mikulas Patocka authored
commit 62496658 upstream. Mode setting in the TGA driver is broken for these reasons: - info->fix.line_length is set just once in tgafb_init_fix function. If we change videomode, info->fix.line_length is not recalculated - so the video mode is changed but the screen is corrupted because of wrong info->fix.line_length. - info->fix.smem_len is set in tgafb_init_fix to the size of the default video mode (640x480). If we set a higher resolution, info->fix.smem_len is smaller than the current screen size, preventing the userspace program from mapping the framebuffer. This patch fixes it: - info->fix.line_length initialization is moved to tgafb_set_par so that it is recalculated with each mode change. - info->fix.smem_len is set to a fixed value representing the real amount of video ram (the values are taken from xfree86 driver). - add a check to tgafb_check_var to prevent us from setting a videomode that doesn't fit into videoram. - in tgafb_register, tgafb_init_fix is moved upwards, to be called before fb_find_mode (because fb_find_mode already needs the videoram size set in tgafb_init_fix). Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vga.kernel.org Signed-off-by:
Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by:
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Kieran Clancy authored
commit 3eba563e upstream. Address a regression caused by commit ad332c8a: (ACPI / EC: Clear stale EC events on Samsung systems) After the earlier patch, there was found to be a race condition on some earlier Samsung systems (N150/N210/N220). The function acpi_ec_clear was sometimes discarding a new EC event before its GPE was triggered by the system. In the case of these systems, this meant that the "lid open" event was not registered on resume if that was the cause of the wake, leading to problems when attempting to close the lid to suspend again. After testing on a number of Samsung systems, both those affected by the previous EC bug and those affected by the race condition, it seemed that the best course of action was to process rather than discard the events. On Samsung systems which accumulate stale EC events, there does not seem to be any adverse side-effects of running the associated _Q methods. This patch adds an argument to the static function acpi_ec_sync_query so that it may be used within the acpi_ec_clear loop in place of acpi_ec_query_unlocked which was used previously. With thanks to Stefan Biereigel for reporting the issue, and for all the people who helped test the new patch on affected systems. Fixes: ad332c8a (ACPI / EC: Clear stale EC events on Samsung systems) References: https://lkml.kernel.org/r/532FE3B2.9060808@biereigel-wb.de References: https://bugzilla.kernel.org/show_bug.cgi?id=44161#c173Reported-by:
Stefan Biereigel <stefan@biereigel.de> Signed-off-by:
Kieran Clancy <clancy.kieran@gmail.com> Tested-by:
Dennis Jansen <dennis.jansen@web.de> Tested-by:
Nicolas Porcel <nicolasporcel06@gmail.com> Tested-by:
Maurizio D'Addona <mauritiusdadd@gmail.com> Tested-by:
Juan Manuel Cabo <juanmanuel.cabo@gmail.com> Tested-by:
Giannis Koutsou <giannis.koutsou@gmail.com> Tested-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> [bwh: Backported to 3.2: adjust context] Signed-off-by:
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Kieran Clancy authored
commit ad332c8a upstream. A number of Samsung notebooks (530Uxx/535Uxx/540Uxx/550Pxx/900Xxx/etc) continue to log events during sleep (lid open/close, AC plug/unplug, battery level change), which accumulate in the EC until a buffer fills. After the buffer is full (tests suggest it holds 8 events), GPEs stop being triggered for new events. This state persists on wake or even on power cycle, and prevents new events from being registered until the EC is manually polled. This is the root cause of a number of bugs, including AC not being detected properly, lid close not triggering suspend, and low ambient light not triggering the keyboard backlight. The bug also seemed to be responsible for performance issues on at least one user's machine. Juan Manuel Cabo found the cause of bug and the workaround of polling the EC manually on wake. The loop which clears the stale events is based on an earlier patch by Lan Tianyu (see referenced attachment). This patch: - Adds a function acpi_ec_clear() which polls the EC for stale _Q events at most ACPI_EC_CLEAR_MAX (currently 100) times. A warning is logged if this limit is reached. - Adds a flag EC_FLAGS_CLEAR_ON_RESUME which is set to 1 if the DMI system vendor is Samsung. This check could be replaced by several more specific DMI vendor/product pairs, but it's likely that the bug affects more Samsung products than just the five series mentioned above. Further, it should not be harmful to run acpi_ec_clear() on systems without the bug; it will return immediately after finding no data waiting. - Runs acpi_ec_clear() on initialisation (boot), from acpi_ec_add() - Runs acpi_ec_clear() on wake, from acpi_ec_unblock_transactions() References: https://bugzilla.kernel.org/show_bug.cgi?id=44161 References: https://bugzilla.kernel.org/show_bug.cgi?id=45461 References: https://bugzilla.kernel.org/show_bug.cgi?id=57271 References: https://bugzilla.kernel.org/attachment.cgi?id=126801Suggested-by:
Lan Tianyu <tianyu.lan@intel.com> Reviewed-by:
San Zamoyski <san@plusnet.pl> Signed-off-by:
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Andreas Schwab authored
commit 8fe9c93e upstream. GCC 4.8 now generates out-of-line vr save/restore functions when optimizing for size. They are needed for the raid6 altivec support. Signed-off-by:
Andreas Schwab <schwab@linux-m68k.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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- 18 May, 2014 2 commits
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Ben Hutchings authored
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Matthew Daley authored
commit 2145e15e upstream. Do not leak kernel-only floppy_raw_cmd structure members to userspace. This includes the linked-list pointer and the pointer to the allocated DMA space. Signed-off-by:
Matthew Daley <mattd@bugfuzz.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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